Tunnel drilling rig is refers to the coal mine full hydraulic tunnel drilling
rig, underground drill rig, tunnel bore hole Drilling Machine, coal mine hydraulic tunnel drilling rig is
mainly used cemented carbide, diamond
compact bit, rotary drilling, hydraulic tunnel drilling rig is widely used
for mine different Angle of ground water, water injection, and put the gas hole and geological
exploration, such as slope anchor
drilling construction.
Specifications and models: ZDY-660, ZDY1200, ZDY-2000s. The all-hydraulic tunnel drilling
rig used in coal mine is widely used in the drilling construction of water
exploration, water injection, gas exploration, geological exploration and slope anchoring at
different angles in the mine. It is
especially suitable for near horizontal drilling of + / - 300 underground coal 0mines and allows all-around use of + / - 900.
The drilling rig adopts hydraulic
transmission mechanism, which has the features of large drilling capacity, fast
speed, simple operation, stable and reliable work and convenient installation.
Tunnel Drilling Machine Tunnel Drilling Machine,Horizontal Drilling Machine,Zdy Drilling Machine,Zlj Drilling Machine Shandong Hengwang Group Co., Ltd , https://www.hwmac.com
Crushing and screening process equipment selection calculation
Design original condition
Copper, Lead and Zinc metal ore, the annual handling capacity = 700X300 = 210000T Q; ore bulk density = 2.6t / m 3, of the medium can be broken; largest ore particle size Dmax = 500mm, water content 4%; typical particle size characteristic curve .
Choose a crushing process plan
Due to the grinding operation, the single-stage ball mill dmax=12mm, d80=8.4mm
Total crushing ratio S=Dmax/dmax=500/12=41.67
Average crushing ratio Sa=41.67 1/3
Set S1=S2=3.7, S3=S/(S1S2)=3.04
Breaking ability
Working time 15 hours, operating rate 62.5%
Q1=720/15=48T/H=1152T/D
Fragmentation ratio
S1=S2=3.7, S3=S/(S1S2)=3.04
Maximum size of each segment
D1= Dmax/s1=500/3.7=135mm
D2= d1/s2=135/3.7=36.5mm
D3= d2/s3=36.5/3.04=12mm
Drainage port size
I1=d1/Z=135/1.60=84.375mm take 85mm
I2=d2/z=36.5/1.60=22.83mm take 20mm
I3=0.8x12=9.6mm take 10mm
Screen hole :
=1.2dmax=14.4mm take 14mm
Process description
The three-stage and one-closed process is simplified into two-stage and one-closed process
Feed quantity Q1=Q2=720T/D
Three-stage crushing Q3=Q1C=396
Cycle load C=1/E-1=55%
The sieve load Q4=1116T/D, the screening efficiency E=65%, and the sieve hole 14mm.
Equipment selection and parameter selection
Coarse crush : PE600X900, 1 set, feeding ore size 500mm, discharge port size 85mm, discharge size 135mm, crushing ratio 3.7, processing capacity 48t/h=26.7m 3 /h
Medium crush : PE250X1200, 1 set, feed size 135mm, discharge port size 22mm, discharge size 36.5mm, crush ratio 3.7, processing capacity 48t/h=26.7m 3 /h
Finely divided : PE250X1200, 1 set, ore size 36.5mm, discharge port size 10mm, discharge size 12mm, crushing ratio 3.04, processing capacity 26.4t/h=14.7m 3 /h
Screening : YA1530, 1 set, sieve hole 14mm-12mm, under the sieve product size dmax=12mm-10mm plateau motor 1 set.